4.2.1 a biodiversity at different levels Flashcards
What does biodiversity do?
It maintains a balanced ecosystem for all organisms
What does all species are interconnected mean?
They depend on one another
What does reduced biodiversity do?
Stops connections between species which harms all species in the ecosystem
What regions have the most biodiversity?
Tropical, moist regions
What regions have the least biodiversity?
Very cold areas and very dry areas
How do scientists know what species are present?
By measuring biodiversity which provides a baseline for the level of biodiversity in the area
What are the different levels biodiversity can be measured at?
Habitat biodiversity
Species biodiversity
Genetic biodiversity
What is habitat biodiversity?
Refers to the number of different habitats found within an area
The greater the habitat biodiversity…
The greater the species biodiversity within the area
What are the two different components of species biodiversity?
Species richness
Species evenness
What is species richness?
The number of different species living in a particular area
What is species evenness?
A comparison of the numbers of individuals of each species living in a community
What is a community?
All the populations of living organisms in a particular habitat
What is genetic biodiversity?
Refers to the variety of genes that make up a species
What can genetic biodiversity within a species lead to?
Different characteristics being exhibited
What does greater genetic biodiversity within a species lead to?
Better adaptation to a changing environment and individuals who are more resistant to disease
What are different versions of genes called?
Alleles
What do alleles cause?
Genetic biodiversity within a species
